ESQL: Simply reenable disabled test (#133838)

org.elasticsearch.xpack.esql.qa.mixed.MixedClusterEsqlSpecIT test
{csv-spec:inlinestats.EvalBeforeDoubleInlinestats1} got run on version
preceding the one it was introduced in. The failure only occured if the
planning of a query happened on an older version, not containing the fix
the test was testing against. This is why the tests passed. An inline
version capability bump should have been introduced along the fix.

Meanwhile the inlinestats capability version got bumped, so this
situation can no longer occur.

Author: bpintea

muted-tests.yml

@@ -537,9 +537,6 @@ tests:
 - class: org.elasticsearch.compute.data.BasicBlockTests
   method: testFloatBlock
   issue: https://github.com/elastic/elasticsearch/issues/133621
-- class: org.elasticsearch.xpack.esql.qa.mixed.MixedClusterEsqlSpecIT
-  method: test {csv-spec:inlinestats.EvalBeforeDoubleInlinestats1}
-  issue: https://github.com/elastic/elasticsearch/issues/133729
 - class: org.elasticsearch.xpack.esql.qa.single_node.GenerativeIT
   method: test
   issue: https://github.com/elastic/elasticsearch/issues/133077